The basic knowledge of grinding wheel
1. The so-called wheel is made of sand with wheels. How is the grinding wheel made, what is the bonding of it? This bonding material is called a binder. The sand particles (abrasive) bonding process, there is no space filled with sand, leaving a certain gap, this gap plays a heat, to accommodate the role of debris, therefore, this gap will enter a certain The amount of air and coolant has a certain benefit for grinding. So, abrasives, voids, binders constitute the three major elements of grinding wheel. In this case,
2, the grinding wheel in the sand chaotic, uneven, can be regarded as tens of millions of knives. After the dressing of the grinding wheel of each grain of the possibility of several cutting edge at the same time to participate in grinding, this property is called abrasive wheel micro-edge. In this case,
In the grinding, the cutting edge changes constantly, after the blunt, passivation of the grinding wheel to continue grinding, for some reason the grinding force increases, when the grinding force exceeds the bond strength, the abrasive will automatically fall off, which Called the wheel "self-detachment." Although the new abrasive particles, but much worse than the grinding force after dressing. If you continue grinding will passivate again, can not get the ideal size and roughness of the workpiece, and heat increased, in this case must immediately dressing wheel.